DENTON ROBERT L

SEC source: 0001628280-26-054686 · wk-form4_1786119537.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000017 · wk-form4_1785419166.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,264

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000015 · wk-form4_1782488196.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000013 · wk-form4_1779999827.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,803

F1 · price: Represents the weighted average of a range of sale prices from $32.25 to $32.50. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001250536-26-000011 · wk-form4_1779138726.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,725

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001250536-26-000009 · wk-form4_1778772036.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 142,764

Underlying: Common Shares · 500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000007 · wk-form4_1777576217.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000004 · form4-03042026_070328.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,264

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000002 · form4-02112026_070207.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,264

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000009 · form4-12292025_021230.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,264

Underlying: Common Shares · 500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000007 · form4-12042025_021232.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000005 · form4-11042025_021115.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,264

Underlying: Common Shares · 2,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000003 · form4-09252025_080952.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-023850 · form4-09082025_040930.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-020963 · form4-08042025_080837.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,264

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-016212 · form4-06092025_080609.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-014122 · form4-05222025_080539.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,922

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001415889-25-013534 · form4-05192025_010525.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001415889-25-007475 · form4-03102025_020314.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,264

Underlying: Common Shares · 4,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-004399 · form4-02182025_090231.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-003544 · form4-02112025_030204.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,264

Underlying: Common Shares · 6,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 6,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 6,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 6,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 6,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-028445 · form4-12062024_021209.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 169,264

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-026804 · form4-11142024_041100.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-025812 · form4-10312024_031006.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 171,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-022751 · form4-09042024_070924.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,264

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-021342 · form4-08152024_060802.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 174,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-020412 · form4-07312024_060740.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 176,264

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-016329 · form4-06112024_060647.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-013206 · form4-05152024_080552.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,398

SEC source: 0001415889-24-013006 · form4-05132024_080531.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,921

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001415889-24-008269 · form4-03182024_080333.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 179,264

Underlying: Common Shares · 2,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-005831 · form4-02292024_080231.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 181,764

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-004534 · form4-02212024_020252.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 183,764

Underlying: Common Shares · 3,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 3,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 3,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 3,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 3,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-24-003481 · form4-02132024_020257.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 186,764

Underlying: Common Shares · 7,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 7,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 7,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 7,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 7,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-016007 · form4-12082023_071255.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 193,764

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-015319 · form4-11212023_031151.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 195,764

Underlying: Common Shares · 4,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-014997 · form4-11132023_041118.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 199,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-014932 · form4-11092023_051146.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-012255 · form4-08152023_070831.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 201,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-008487 · form4-05222023_070538.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 203,264

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-008260 · form4-05182023_050553.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,523

SEC source: 0001415889-23-008037 · form4-05152023_090553.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,464

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001415889-23-007098 · form4-05022023_080501.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 204,764

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-005358 · form4-03232023_080302.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 206,764

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-004485 · form4-03082023_090331.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 208,764

Underlying: Common Shares · 7,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 7,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 7,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 7,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 7,000Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-003518 · form4-02282023_100249.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 215,764

Underlying: Common Shares · 1,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-23-002352 · form4-02132023_090233.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 217,264

Underlying: Common Shares · 4,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-22-011107 · form4-11072022_061122.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 221,264

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-22-009886 · form4-09232022_060935.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 223,264

Underlying: Common Shares · 1,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 1,250 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,250 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,250 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,250 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-22-008663 · form4-08162022_070803.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224,514

Underlying: Common Shares · 2,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.